Insufficient Logging in Echo Go with Cockroachdb

Insufficient logging in an Echo Go service that uses Cockroachdb can leave failures undetected and obscure the context needed for incident response. When HTTP handlers interact with Cockroachdb, missing or unstructured logs remove visibility into request lifecycle details such as transaction retries, SQL statement outcomes, and correlation identifiers.

Echo Go applications often handle multiple database calls per request, and Cockroachdb may return transient errors that require retries. Without logging each attempt, including the SQL, parameters, retry count, and final status, operators cannot reconstruct the sequence of events that led to a failure. This lack of traceability is especially risky for distributed transactions where a commit might partially succeed across nodes.

Another exposure occurs when application-level errors are swallowed or replaced with generic HTTP responses. For example, a handler might catch a Cockroachdb constraint violation but log only a high-level message, omitting the constraint name, the row data attempted, and the client identity. This makes it difficult to differentiate between malicious input and legitimate edge cases, and it weakens auditability for compliance mappings such as OWASP API Top 10 and SOC2 controls.

Structured logging with severity levels and correlation IDs bridges the gap between Echo Go routing logic and Cockroachdb operations. By attaching a request ID to both the HTTP context and each database call, you can correlate logs across services and perform root cause analysis. Without this, findings related to Data Exposure and Inventory Management may indicate missing observability rather than code defects, but the underlying risk remains elevated due to limited detection and response capabilities.

Remediation focuses on structured, contextual logging around Cockroachdb interactions in Echo Go handlers. Use a logger that supports fields (e.g., logrus or zap) and attach request-scoped identifiers to every database operation. Below are concrete examples that integrate logging with typical Cockroachdb patterns in Go.

package main

import (
	"context"
	"fmt"
	"net/http"
	"time"

	"github.com/labstack/echo/v4"
	"github.com/lib/pq"
	"go.uber.org/zap"
)

type App struct {
	db  *sql.DB
	log *zap.Logger
}

func (a *App) CreateUser(c echo.Context) error {
	reqID := c.Request().Header.Get("X-Request-ID")
	if reqID == "" {
		reqID = "unknown"
	}
	ctx := context.WithValue(c.Request().Context(), "reqID", reqID)

	var payload struct {
		Email string `json:"email"`
	}
	if err := c.Bind(&payload); err != nil {
		a.log.Warn("invalid request body", zap.String("req_id", reqID), zap.Error(err))
		return echo.NewHTTPError(http.StatusBadRequest, "invalid payload")
	}

	// Use context to pass request ID to database calls
	ctxWithTrace := context.WithValue(ctx, "query_source", "create_user_handler")
	result, err := a.db.ExecContext(ctxWithTrace, `INSERT INTO users (email, created_at) VALUES ($1, $2) RETURNING id`, payload.Email, time.Now().UTC())
	if err != nil {
		// Log detailed Cockroachdb error information
		var pqErr *pq.Error
		if errors.As(err, &pqErr) {
			a.log.Error("cockroachdb error in user creation",
				zap.String("req_id", reqID),
				zap.String("code", pqErr.Code),
				zap.String("message", pqErr.Message),
				zap.String("constraint", pqErr.Constraint),
				zap.String("query", pqErr.Query),
				zap.Int32("position", pqErr.Position),
			)
		} else {
			a.log.Error("database exec failed", zap.String("req_id", reqID), zap.Error(err))
		}
		return echo.NewHTTPError(http.StatusInternalServerError, "unable to create user")
	}

	id, _ := result.LastInsertId()
	a.log.Info("user created successfully",
		zap.String("req_id", reqID),
		zap.Int64("user_id", id),
		zap.String("email", payload.Email),
	)
	return c.JSON(http.StatusCreated, map[string]int64{"id": id})
}

func (a *App) Transfer(c echo.Context) error {
	reqID := c.Request().Header.Get("X-Request-ID")
	ctx := context.WithValue(c.Request().Context(), "req_id", reqID)

	fromID := c.Param("from")
	toID := c.Param("to")
	var amount float64
	if err := c.Bind(&amount); err != nil {
		a.log.Warn("invalid transfer payload", zap.String("req_id", reqID), zap.Error(err))
		return echo.NewHTTPError(http.StatusBadRequest, "invalid amount")
	}

	tx, err := a.db.BeginTx(ctx, nil)
	if err != nil {
		a.log.Error("failed to begin transaction", zap.String("req_id", reqID), zap.Error(err))
		return echo.NewHTTPError(http.StatusInternalServerError, "cannot start transaction")
	}
	defer func() {
		if err != nil {
			tx.Rollback()
			a.log.Warn("transaction rolled back", zap.String("req_id", reqID), zap.Error(err))
		} else {
			err = tx.Commit()
			if err != nil {
				a.log.Error("commit failed", zap.String("req_id", reqID), zap.Error(err))
			}
		}
	}()

	var fromBalance float64
	err = tx.QueryRowContext(ctx, `SELECT balance FROM accounts WHERE id = $1`, fromID).Scan(&fromBalance)
	if err != nil {
		a.log.Error("select from account failed", zap.String("req_id", reqID), zap.String("account", fromID), zap.Error(err))
		return echo.NewHTTPError(http.StatusInternalServerError, "transfer error")
	}
	if fromBalance < amount {
		a.log.Warn("insufficient funds", zap.String("req_id", reqID), zap.String("account", fromID), zap.Float64("balance", fromBalance))
		return echo.NewHTTPError(http.StatusBadRequest, "insufficient funds")
	}

	_, err = tx.ExecContext(ctx, `UPDATE accounts SET balance = balance - $1 WHERE id = $2`, amount, fromID)
	if err != nil {
		a.log.Error("debit update failed